Hi Can anyone help me My No1 son has put some old fuel [1] in his SP50 and now it won't start. We've drained & refilled the tank & confirmed that it will start using liberal doses of easy start into the air intake [2]. The fuel pumps running ok, so all I can think of is a blocked jet. Problem is, I don't have a manual and don't want to strip the carb down without one. Anyone got any helpful advice ? Can I get at the jets easily ? [1] from an unsealed petrol can that has been in the garage for about 6 months [2] it starts and runs for about 30 seconds on the vapour then stops. Thanks in advance GM R1150R